How Ice Dams Contribute to Roof Moisture

Ice dams form when snow melts on warmer roof surfaces and refreezes at colder edges, allowing water to back up under roofing materials and enter the roof system.

RNKC Explanation

RNKC explains ice dams as the result of heat loss, snow accumulation, and temperature imbalance rather than roofing material failure alone.

Moisture Risks

• Bulk water intrusion
• Hidden deck saturation
• Repeated freeze-thaw stress

RNKC Perspective

RNKC treats ice dams as a system-level winter moisture problem involving insulation, air sealing, and roof geometry.

For winter roofing knowledge, visit the ROOFNOW™ Knowledge Center.